Improvement in sewing-machines



2 Sheets-Sheet 1.

E. E. BEAN. Sewing-Machine.

10.209,543.. l Patented Nov. 5,1878.

N. PETERS. FHOTO-UTHOGRAFMER. WASHNBTON, D C.

2 Sheets-Sheet; 2.

E. E. BEAN.

Sewing-Machine.

No. 209,543. Patented Nov-.5,1878.

i, l. 1-J4 fi g2 x -f f 6 N-PETERS, PHOIV'O-L-ITHOGRAPHER, WASDHNGTON,D. C.

-` NITED STATES FFIC'E EDwIN E. DEAN, or BOSTON, MASSACHUSETTS, ASSIGNOETo THEl CON- l SOLIDATED WAX THREAD SEWING MACHINE COMPANY.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 209,543, dated November5, 1878; application iilcdL I May 27, 1878. v

To all whom t may concern.-

Be it known that I, EDWIN E. BEAN, of Boston, county of Suffolk, andState of Massai chusetts, have invented certain Improvements inSewingMachines, of which the following is 4a full, clear, concise, andexact description,

when taken in connection with the accompanyin g drawings, making a parthereof.

The drawings illustrate one form of sewingmachine embodying theinvention.

Figure lis an end elevation, (needles down, presser-foot down,) and Fig.2 is a plan, with the upper part of the frame omitted, of a Nationalsewing-machine embodying my invention. The other gures show details morefully described below.

The invention relates more especially to the sewing of tubular articles,particularly to sewing the stays in the leg of the well-knownsaddle-seam boot, and consists of a needle-bar of a peculiarconstruction; also, a needle-bar carriage of a peculiar construction;also, a new device for operating a second threadguide where two needlesare used; and, lastly, certain combinations of ingredients, all now tobe more fully described.

The machine shown in the drawings is adapted especially for themanufacture of saddle-seam boots. l

A is the main frame; B, the shaft through which the awl and presser-footbars b b are worked 5 C, the shaft which works the needlebar; D, thefeed-shaft. All the parts not lettered are the same as those in thewell-known National machine. The projection d and the guide d are fullydescribed in Patent No. 200,111, to Joseph H. 'Walken The needle-bar Fis a metal bow, having a slide, f f1, at each end. (See Fig. 3, which isa longitudinal section through the bar, its carriage G, and thebow-shaped frame H.) These slides f f1 fit the ways g gl in thebow-shaped needle-bar carriage G, so that the needle has the usualreciprocating motion imparted to it by the needle-bar shaft C, as inother National machines, and the carriageGis moved to feed thematerialwhile the needle extends through it, as in the well-knownneedle-feed sewinglnachines. In this case the needle-bar carriageGs'fast to. the feed-Shaftk Das in the National machine. l

The usual cast-olf carriage g2 is mounted in the upper ways, g', oftheneedle-bar carriage G; but a part of the needle-bar passes throughit, as shown in Fig. 7. Y I The bow-shaped work-support H is' secured tothe main frame A, and projects from it, as

shown, the feature of novelty beingfthat its bow is next the operator,the lfeed carrying the work from the bend toward the free end of the bowinstead of on it, as heretoforein all ma`.

chines known to me with va bow-shaped work.- support. The needle-bar Fand itscarriage G are each new with me. In' the machine shown there aretwo needles, fzf, for sewing seamsv parallel with each other.

The best form of presser-foot known to me for use with my improvedmachine is Shown in detail in the drawings.'

When two needlesl are used two threadguides are desirable; and in orderto obviate the necessity for using two bars, one for each thread-guide,I have devised a device (shown in detailin Figs. 8, 9, and 10) forattaching a second thread-guide to the bar c, which bar c is the same inthe machine shown as that used inthe National machine, and actuated inthe same way by the connecting-rod' cl, lever c2, and cam c3. The usualthread-guide c4 is attached to its bar c in the ordinary way. The extrathread-guide c5 is attached to a sleeve, c6, on the bar4 c, and is movedin one direction by 'a stud, 0"', projecting from bar c, which strikes ashoulder on the sleeve c6, so that sleeve c6 moves with the bar o in onedirection as soon as stud c7 is in contact with sleeve c6.

This will be understood by reference to Fig. 9,

which is a section of the thread-guide bar, taken on the line .fr x inFig. 8, and shows the relative motions of the two thread-guides, at k kbeing shownthe position of .the two needles before they feed thematerial, and at k k after they have fed the material. This motion ofsleeve c( is against the force of a spring, c", and consequently, assoonv as the stud c'I moves back, the sleeve c, under the influence ofspring c, follows it, the Dsleeve beingv heldin contact with stud c"until the stop o9, fast to sleeve c6,

brings up against the pendant c1", when the stud c" leaves sleeve c6. Itwill be seen, therefore, that guide c4 begins its motion slightly soonerthan guide c5 and ends its motion slightly after the motion of c5 hasbeen arrested by stops o9 c1". This is in order to give guide c5 itsproper motion, which it would not have if fast to bar c, by reason ofits eye being considerably farther from the axis of bar o than is theeye of guide c. In order to adjust the backward motion of guide c5, thestop o9 is on a collar, c, which surrounds sleeve c6, and can be set soas to bring the eye of guide c5 into precisely the right position tomake the travel of' the eye c5 practically the same as the travel of theeye o4.

The pin c12 on collar c will be struck by stud c", and thus carry backsleeve c8 whenever the spring o8 does not act. This part of my inventionconsists in the combination of two or more thread-guides on one bar, theeyes .of the guides at diii'erent distances from the axis of the bar,and suitable mechanism for causing the travel of all the thread-guidesto be the same, this being a matter of great practical importance whentwo or more threadguides are used, for the reason that if the travel ofone be to any appreciable extent greater than that of the other, one ofthe seams will be tighter than the other, and there will be great dangerof breaking the thread. I

know no other machine where two threadguides are used on the same bar,one fast to the bar and the other adjustably secured to it, so that itsstroke may be less than that due to its distance from the axis.

What I claim as my invention is- 1. The bowed needle bar F, having theslides ff 1, as above described.

2. The bowed needle-bar carriage G, having ways g g1 adapted to receivethe needle-bar F and cast-offl carriage g2, all substantially as setforth.

3. The combination of the bowed needle-bar F, its carriage G, and thework-support H, all substantially as and for the purposes set forth.

4. In combination, the bar c, sleeve c6, the two thread-guides c4I c5,the former attached to bar c and the latter to sleeve c6, and mechanism,substantially such as is described, for causing the travel of bothguides to be substantially the same, the whole combination being andoperating substantially as described. y

5. In combination, the cast-0E` carriage g2,

needle-bar carriage G, and needle-b'ar F, one

arm of the needle-bar passing through the cast-off carriage, allsubstantiallyas described.

EDWIN E. BEAN.

Witnesses:

J. E. MAYNADmR, l- GEoRGE O. G. Coruna.r

